Typewriting-machine



0. WUODWARD.

TYPEWRITING MACHINE.

APPLICATION men NOV. 13, 1919.

Patented Apr. 26, 1921.

INVENTUR (Ll/e411 T/lrrvhu-k/J iiwe X /4% H5 ATTORNEY UNITED STATES PAT N GFFECE. i

OSCAR WOODWABD, OF BABYLON, YORK, ASSIG-NOR TO REMINGTON WRITER COMPANY, OF IIIION7 NEW YORK, A CORPORATION OF NEW YORK.

TYIPEWRITING MAGEINE.

T 0 all whom it may concern;

Be it known that 1, Ocean Woonwann,

r a typewriting-machine so that said pivot wire will be maintained in a relatively fixed position at all times and will not be disturbed or displaced as the result of the actuation of type bars or other parts fulcrumed on it. I

As heretofore constructed typewriting' machines employing type bars mounted on a common pivot wire or fulcrum have had such pivot wire arranged in a groove, slotway or seat in the type bar support or segment. In such cases where the pivot or fulcrum wire fits loosely in its groove or seat it is liable to displacement or to shift its position sidewise, during the operation of the type bars, with consequent poor alinement. When it is attempted to remedy this defect by making a very tight fit between the pivot wire andits bearing or seat, it is found to be extremely difficult to force the wire or member in and out of place. Also, devices have heretofore been provided for tightening or fixing the pivot wire but such prior devices have been open to various objections such as liability to cause breakage of the segment or distortion of it or of the pivot wire itself. These troubles have been primarily due to the fact that the tightening devices were screwed in or otherwise applied to an excessive extent. My present invention aims to overcome these defects and to provide a comparatively simple but efficient pivot wire tightener which may be readily applied to existing styles of typewriting machines. In carrying out my invention I provide a construction in which the effect of the tightening means is limited so that it cannot be applied to an excessive of harmful extent. This is done by providing an elastic, resilient or spring element which cooperates with the tightener to limit the amount of pres- Sure that can be conveyed by the tightener Specification of Letters ?aten t.

Patent-ed as. 26, 1921.

Application filed November 13, 1919. Serial No. 337,633.

to the pivot wire. Stated in another way,- resilient or elastic means are employed for pressing the pivot wire against its hearing or support, the pressure being limited by the forcing effect of which the spring means is capable.

To the above and other ends which will hereinafter appear, my invention consists in the features of construction, combinations of devices, and arrangements of parts hereinafter described and particularly pointed opt in the claims. 5

In the accompanying drawings,

Figure 1 is a fragmentary front to rear sectional view of the type action, mounting and associate parts of a typewriting machine embodying one form of my present invention.

Fig.2 is a front elevation of the type bar support or segment showing the pivot wire mounted thereon and with my invention applied at its end portions.

Fig. 3 is an enlarged fragmentary front view of one end of the segment, parts being broken away to illustrate my invention more clearly.

Fig. at is a fragmentary top plan view of an end portion of the segment illustrating the slot or groove for the fulcrum wire.

Fig. 5is a top plan view of Fig. 3 but with the nut or fulcrum wire tightener sectioned away.

Figs. 6 and 7 are views corresponding to Fig. 5 but showing modified forms of the flat spring or resilient element.

Fig. 8 is a view corresponding to Fig. 3 but showing a modification.

'The machine to which my invention is shown as applied is disclosed more fully in my patent dated June 8, 1920, No. 1,342,489. On the top plate 1, which is comprised in the main frame, there is suitably secured a vertically disposed type bar support or segment 2 which is provided with a series of radial slots 3 in which are arranged front strike type bars 4. These type bars are fulcrumed or pivoted on a common fulcrum or pivot wire 5 which is supported on the segment 2 in a manner hereinafter specifically described. The set or series of type bars are normally supported in substantially horizontal positions on a type rest 6, and are adapted to cooperate with the front face of a platen 7, diagrammatically illustrated. In printing position the type bars coiiperate with a center guide 8 which is secured to the front upper portion of the segment 2. Type bar actuatmg devices are provided for each type bar which cooperate with a slot 9 formed in the heel portion of the bar, said devices comprising a headed pin 10 engaging in said slot, said pin projecting lat orally from the upper end portion of the vertically disposed arm of a lever 11 having a stationary pivot 12. The short horizontally disposed arm of said lever is connected by a link 13 with a key lever 14, the set of key levers being arranged within the base portion 15 of the main frame.

The fulcrum or pivot wire 5 is curved or arcuate and its hearing as best shown in Figs. 3 and 4, is a correspondingly curved or arcuate slot-way or groove 16 cut or otherwise formed in the rear face of the segment plate or support 2. The opposite curved walls 16* and 16 of the hearing or slot-way are slightly depressed or cut away on curves corresponding to the pivot wire which is as usual circular incross section. The form and dimensions of the seat or slot-way are such that the pivot wire does not fit tightly therein but is. loose enough to be readily slid, pushed or pulled into and out of place.

In order to do away with objectionable looseness of the pivot wire on its support or hearing, I provide novel means for forcing or pressing the pivot wire against its bearing to an extent sufiicient to fix the pivot wire in place so that it will provide an unvarying point of pivotal support for all of the type bars that are fulcruined on it. In the present instance the pivot wire tight ener or securing devices are applied to each end of the pivot wire where it projects above the upper horizontal face of the type bar segment 2, and this duplication of devices is preferred although not essential to the carrying out of my invention in all instances. As shown in Figs. 2 and 3 the upper projecting end portions of the pivot wire 5 are reduced to provide coned portions 5 which terminate in threaded tips or ends 5*. Each threaded end receives a pivot Wire tightener or nut-17 which may be screwed down on the threaded end 5" until arrested by the upper end of the cone 5. Interposed between the body portion or pivot wire proper 5 and the nut or tightener 17 is an elastic or resilient member or element which in the present instance is in the form of a fiat spring or spring plate 18. The free end portion of the spring member 18 is formed with a round hole or opening indicated at 19, which receives the coned portion 5 of the pivot wire. The springs 18 are arranged on top of the segment and project inward or toward the middle of the segment, the inner end portion of each spring or member 18 being secured to the top of the segment by a headed screw 20. The inherent tendency of the elastic element 18 is to spring upward away from the top face of the segment 2, and this tendency or tension is transmitted through the nut or tightener 17 to the pivot wire proper 5 which is consequently pressed, pulled or forced upward into contact with the inner or upper face 16 of the hearing or slot-way 16. It will be understood that this pressure or force is increased by tightening or screwing down the tightener or nut 17 at each end of the pivot wire, but the extent to which the nuts can be tightened is limited by the upper-ends of the coned portions 5?. The force or inherent tension or pressing power of the springs or elastic elements 18 is such, and the tighteners or abutments 1'? are so related to them and to the associate parts, that even when the tighteners are screwed down to the limit or full extent the pressure of the pivot wire against the upper or shorter wall or face of its bearing is not excessive but is entirely suliicient or adequate to hold. the pivot wire in fixed position at all times and to resist displacement due to reactions of the type bars against their points of pivotal support during printing operations.

Various changes may be made without departing from the principles of my invention. F or example, in Fig. (3 there is illus trated a springplate 21, (littering somewhat from the spring plate 18 of the Figs. 15 construction in that the spring plate 21 is provided with a slotway open at its rear. This slot-way fits around the coned portion :3 of the pivot wire and the spring reacts against the tightener 17 as in the first construction. However, by slightly loosening the screw 20 which holds the spring '21 in place, said spring may be swung forward to the dotted line position so as to clear the pivot wire and its bearing. This construction enables the pivot wire to be withdrawn without entirely removing either of the springs 21.

In Fig. 7 is illustrated a further modification of the spring or elastic element. The spring 23 of the Fig. 7 construction is provided with a slot 2-l which has a mouth opening at the end of the spring instead of at the side as in the Fig. (5 construction.

A further modification is illustrated in Fig. 8 which shows a pivot wire having a coned portion 25. as in the first described construction, but with the threaded end or tip 25 bent vertically instead 01 conforming to the general curve of the pivot wire as does the tip 5. The Fig. 8 construction enables the tightener or nut 17 which coiipcrates with the tip 25* to be horizontally arranged so that it is parallel with the top face otthe segment and with the free end portion of the spring 18. Consequently the bottom face of the nut contacts with the upper surface of the spring on all sides instead of only at one side as in the Figs. 1-5 construction.

Other changes will suggest themselves to those skilled in the art.

By my present invention important new and improved results are achieved through simple and inexpensive means which may readily be applied to difl'erent styles of typewriting machines and may be adapted to existing makes of such machines with but slight changes. In carrying out my present invention it will be observed that there is provided a pivot wire in combination with a pivot wire tightener and an elastic element cooperating with the tightener to limit the amount of pressure that can be conveyed by the tightener to the pivot wire that in the present instance a spring plate supported by the type bar support cooperates with the pivot wire to hold it firmly in position by an elastic tension; that an elastic element is arranged between the pivot wire tightener and the pivot wire proper, the construction being such that the amount of pressure that can be conveyed by the tightener' is limited to the power of the elastic element; that a spring member or element operates on the pivot wire to control the pressure exerted by the pivot wire against its support; that resilient means press the pivot wire against its bearing; and that means are provided which act through a spri or resilient member to force'the pivot wire against its I hearing or seat, the pivot wire in the present instance pressing or pulling against the innot or shorter'wall of the slot way' or groove in which it is arranged or seated.

What I claim as new and desire to secure by Letters Patent, is

1. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a pivot wire tightener, and an elastic element cooperating with the tightener to limit the amount of pressure that can be conveyed by the tightener to the pivot wire.

2. In a 'typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a spring plate supported by the type bar support and cooperating with the pivot wire to hold it firmly in position by an elastic tension.

In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, said pivot wire being mounted on said support, and a spring plate operative on said pivot wire to control the amount of the pressure exerted by said pivot wire against said support. 7

4. In a typewriting machine, the combitype bars mounted thereon, and resilient means for pressing said pivot wire against its bearing.

5.-In a typewriting machine, the combination of a type bar segment provided with a bearing for a pivot wire, a pivot wire, type bars thereon, a spring, and means act in through said spring to force said wire against said bearing.

6. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, an abutment adjustably connected to said pivot wire, and an elastic member operating through said abutment on said pivot wire to secure said pivot wire in place.

7. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a pivot wire tightener, and an elastic element between the tightener and the pivot wire proper, the construction being such that the amount of pressure that can be conveyed by the tightener is limited to the power of the elastic element.

8. In a typewriting machine. the combination of'a type bar support, type bars, a pivot wire for said type bars, an adjustable pivot wire tightener, and an element interposed between said tightener and said pivot wire proper, said element being effective to limit the pressure conveyed by said tightener.

9. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, a pivot wire tightener, and an elastic element controlled by said tightener and eiiective on the end of said pivot wire to pull it.

10. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, said pivot wire having a threaded end, a nut adjustable on said end, and a spring element supported by said support and with which said nut cooperates.

11. In a typewriting machine, the combination of a type bar support, type bars, an

arcuate pivot wire having threaded ends,

nuts adjustable on said threaded ends, and yielding plates secured to said support and cooperating with said nuts.

12. In a typewriting machine, the combination of a type bar support, type bars, a pivot wire for said type bars, said pivot wire havin a threaded end, a nut adjustable on said on a spring plate, and a screw for securing said plate to said support, said spring plate cooperating with said nut to exert a pull on said pivot wire.

13. In a typewriting machine, the combination of a slotted type bar-support, type bars in the slots in said support, a common pivot wire for said type bars, said pivot wire being seated in a groove in said supnation of a slotted type bar support, type bars in the slots in said support, a common pivot wire for said type bars, said pivot Wire being seated in a groove in said support, a spring device efl ective on said pivot wire, and means for varying the effect of said spring device.

15. In a typewriting machine, the combination of atype bar support provided with a series of radial slots; type bars in said slots; a pivot wire seated in an arcuate groove in said support; and means for variably pressing said pivot wire against the inner side of said arenate groove, said means comprising a spring mounted on said support, and an adjustable device for variabiy transmitting the pressure of said spring to said pivot wire.

16. Ina typewriting machine, the combination of a type bar support formed with an arenate roove and provided with a series of radial s ots; type bars in said slots; a pivot wire seated in the arcnate groove in said support; and means for variably pressing said pivot Wire against the inner side of said areuate grom'e, said means comprising a pair of nuts threaded on to the ends of said pivot wire, and a'pair of springs secured to said support, each spring cooperative with one of said nilts to press said pivot vvire against the inner wail of said groove.

Signed at the borough of Manhattan. city of New York, in the county of New York and State of New York this tenth day of November, A. D. 1919.

" OSCAR WOOTD'WARD.

Witnesses:

ANNA JOHNSON, W. Peon. 

